Braking mechanism for guns having recoiling barrels.



K; VGLLER.

BRAKING MBGHANISM FOR GUNS HAVING 'REGOILING BARRELS.

APPLIOATION FILED MAR. 28, 1901.

910,976. Patented Jan. 26, 1909.

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l|@:\\\\\\\\\\\\\\\\\ 6 l m in ay/1w INVENTDR wATTEIRNEfi KABL'VDLLER, OF DU$SELDOIR 'QERMhhIY, ASSIGNOR TO RHEINISCIIE METALLWAREN-UND MASOHINENFABRIK, OF DUSSELDOREDERENDORF, GERMANY.

earner enrich.

BRAKING JVECHANISM' FORE-"(INS EZAVIZIG BEQQILING Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed March as, 1907. Serial No. 865,18.

To all whom it may concern:

Be it known that I, KARL VoLLnR, engineer, a subject of the German Emperor, residing at Dusseldorf, l7 Fulicherstrasse, Germany, have invented certain new and useful Improvements in Brakin Mechanism for Guns Having a Recoiling Barrel; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

When guns having a recoil-ing barrel are rapidly fired they become very hot and the braking liquid increases in volume so much that the barrel no longer returns completely. The action of the brake is thus unfavorably affected, that is to say the length of the recoil is diminished and concussion occurs at the end of the recoil.

The present invention seeks to overcome these objections by constructing a part of the wall of the chamber in the brake cylinder in such a manner that it can yield under action of a spring correspondingly with the expansion of the liquid due to its increased temperature.

The invention is illustrated in the accompanying longitudinal section of the rear end of the brake cylinder. The latter is connected in the usual manner with the gun barrel and recoils therewith; during the recoil the rear end of the cylinder is not subject to pressure and the expansion device in question is only under the comparatively small braking pressure during the return.

In the rear part of the brake cylinder at to the rear of the recoil resisting piston a is formed an expansion chamber comprising a cylinder 1) within which works the piston 0 having an extension (1 provided with packing rings 6 held up by the screw nut f. This piston c is pressed by spring h to the front end of the cylinder 1), being held against the ring g. The space i in which the spring 7t lies, can either be closed at its rear end so that the pressure of the air within it may aid the spring when the piston is pushed back, or be in communication with the atmosphere through the bore 70, in which case a diaphragm of fine meshed wire gauze i should be inserted in the bore to exclude dust when air is drawn in; this gauze may be kept in place by a ring Z and screw m.

The action is as follows :When the braking liquid expands owing to the heat accumulated during prolonged firing, thepiston c in the normal position is pressed back by the liquid into cylinder 12, provided, of course, that the spring It has been selected to exert the proper degree of pressure. At the recoil a vacuum is produced in the brake cylinder corresponding with the volume of the piston rod from which the brake cylinder is receding, and the piston c is again pushed forward by spring it until it rests against the stop g. During the return the liquid in this part of the brake cylinder is under pressure and the piston c is pushed back again; when the gun comes to rest the piston retains this osition which is the further back in the cy inder Z) the higher the temperature of the braking liquid.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a recoil brake for guns, the combination, with the brake fluid cylinder, and a recoil-resisting member therein, of an expansion chamber in communication with the cylinder interior at that end not subject to pressure during recoil.

2. In a recoil brake "for guns, the combination, with the brake fluid cylinder, and a piston therein, of an expansion chamber in com munication with the cylinder interior at a point to the rear of the piston during the recoil movement.

3. In recoil brake for guns, the combination, with the brake fiuicL cylinder, and a piston therein, of a yielding expansion chamber in communication with the cylinder interior at that end not subject to pressure during recoil.

4. In a recoil brake for guns, the combination, with the brake fluid cylinder, and a recoil resistin member therein, of an expansion chamber in communication with the cylinder interior at that end opposite the pres sure end of the cylinder.

5. In a recoil brake for guns, the combination, with the brake fluid cylinder, and a recoil-resisting member therein, of an expansion chamber in communication with the cylinder interior at that end opposite the pressure end of the cylinder, a piston in the expansion chamber, and yielding means press: ing the piston towards the entrance to said chamber.

6. In a recoil brake for guns, the combination, with the brake fluid cylinder, and a recoil resisting member therein, of an expansion chamber in communication with the cylinder interior at that end opposite the pressure end of the cylinder, a piston in the eX- pansion chamber, and a spring pressing the piston toward the entrance to said chamber.

7. In a recoil brake for guns, the combination, with the brake fluid cylinder, and a recoil-resisting member therein, of an expan sion chamber arranged in the cylinder Wall and in communication with the cylinder interior at that end not subject to pressure during recoil, a piston in the expansion chamber, and a spring pressing the piston towards the entrance to said chamber.

1 In testimony whereof I have afiixed my signature to this specification, in thepresence of tWo Witnesses. KARL VOLLER.

Witnesses: I

i ALFRED PQHLMEYER,

M. ENGELs. 

